All upgrading O2 customers can start using their iPhone 3G straightaway by transfering their existing sim into the new device using the sim ejection tool in the box and syncing with iTunes.
Customers new to O2 can start using their device once they have synced with iTunes and the phone account has been activated.
Once you've got your new iPhone 3G, you'll need to connect to the latest version of iTunes to activate it.
Before activating
1. Check your voicemail
Before you activate your iPhone 3G, make sure you listen to your current voicemails.
If you're an existing O2 customer, activation will delete your existing voicemails.
If you're transferring an existing number from another network operator, existing voicemails will not be transferred.
2. Transfer your contacts, music and photos
Before you activate, migrate your existing mobile contacts into Outlook, Outlook Express on the PC, or Address Book or Entourage on the Mac.
To activate your iPhone 3G
Insert the SIM card into your iPhone 3G. (Upgrading Pay Monthly and existing iPhone customers should use your existing SIM card.)
Download and install the latest version of iTunes.
Connect iPhone to a USB 2.0 port on your Mac or PC (not on the keyboard) using the included cable. iTunes opens automatically.
Follow the onscreen instructions in iTunes to activate iPhone 3G and sync your contacts, calendars, music, photos, podcasts, videos, email accounts, and web bookmarks.
If you're new to O2 or billed by Carphone Warehouse and transferring your existing number, contact us with you PAC code if you've not done so already.